package com.demo.day412;

/**
 * @Auther: MFM
 * @Date: 2021/6/8 - 06 - 08 - 22:48
 * @version: 1.0
 */

public class Demo {
    public static void main(String[] args) {
        String s1 = "a";
        String s2 = "b";
        System.out.println(s2);
        String s3 = s1 + s2;
        String s4 = "a" + "b";
        s2 = "c";
        System.out.println(s2);

    }
}
